large red bell pepper (about 10 oz / 300 grams) • tuna (about 9 oz / 250 grams), drained • tomatoes, peeled (or 1 small can whole peeled tomatoes) • large onion (about 4 oz / 120 grams) • Salt to taste and a pinch of sugar • olive oil (about 1.75 oz / 50 grams) • store-bought or homemade empanada dough • hard-boiled eggs • egg, beaten • Preheat the oven 15 minutes before baking